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Band Pass Filter Bank Design (250–500 MHz) for Radio Astronomy Application Based on Metamaterial...
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22 IEEE A&E SYSTEMS MAGAZINE MARCH 2015 Band Pass Filter Bank Design (250–500 MHz) for Radio Astronomy Application Based on Metamaterial ZOR Techniques Sougata Chatterjee, Anil Raut, Suresh Kumar Front End Group, Giant Metrewave Radio Telescope Pune, India INTRODUCTION M HWDPDWHULDO 070 LV DQ DUWL¿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¿UVW SURSRVHG 070=25 DQG UHDOL]HG LW LQ PLFURVWULS FRQ¿JXUDWLRQ 8VLQJ WKH 070=25 WHFKQLTXH VHYHUDO UHVHDUFKHUV >@±>@ KDYH GHVLJQHG EDQG SDVV ¿OWHUV %3)V LQ GLIIHUHQW IUHTXHQF\ EDQGV 7KH *LDQW 0HWUHZDYH 5DGLR 7HOHVFRSH *057 LV WKH ZRUOG¶V ODUJHVW PHWHU ZDYHOHQJWK UDGLR WHOHVFRSH VHH 6ZDUXS HW DO >@ ,Q WKH FXUUHQW XSJUDGH RI WKH *057 UHFHLYHU V\VWHP ± 0+] ZH KDYH UHGHVLJQHG %3)V XVLQJ 070=25 WHFKQLTXHV LQ WKH IRO ORZLQJ EDQGV ± ± ± DQG ± 0+] G% EDQGZLGWK $ OLWHUDWXUH VXUYH\ VKRZV WKDW ORZIUHTXHQF\ GHVLJQ ZLWKLQ D FRQVWUDLQHG VL]H KDV QRW EHHQ SUHYLRXVO\ DWWHPSWHG 7KLV DU WLFOH GHVFULEHV EULHÀ\ D XQLW FHOO RI 070=25 DQG SURFHHGV IXUWKHU LQWR WKH GHVLJQ RI D ¿YHSROH %3) DW D ± 0+] EDQG 8VLQJ D SDUDPHWULF DSSURDFK RXU GHVLJQV ZHUH RSWLPL]HG WR REWDLQ D JRRG EDQGZLGWK DQG JRRG UROORII UHVSRQVH 7KH VLPXODWLRQ ZDV FDUULHG RXW XVLQJ PHWKRG RI PRPHQWV $'6 VRIWZDUH 7KH IDEULFDWHG %3) ZDV LQVWDOOHG LQ WKH XSJUDGHG *057 V\VWHP >@ MTM-ZOR BPF DESIGN FOR 420–520 MHZ 7KH XQLW FHOO RI D 070 WUDQVPLVVLRQ OLQH 7/ LV D VHULHV FRQ VLVWLQJ RI D VKXQW FDSDFLWRU C L DQG DQ LQGXFWRU L L ZKHUH WKH SURSDJDWLRQ FRQVWDQW ȕ LV QHJDWLYH LQ D VSHFL¿F IUHTXHQF\ EDQG )LJXUH 7KLV W\SH RI 7/ LV FDOOHG D SHULRGLFDOO\ OHIWKDQGHG WUDQVPLVVLRQ OLQH 3/7/ 3DUDVLWLF 5+ HIIHFWV KDPSHU WKH GH VLJQLQJ RI D SXUH 3/7/ KHQFH WKH 070 ORDGHG OLQH LV FDOOHG D &5/+ 7/ >@ >@ ,Q WKH &5/+ 7/ WKH UHVRQDQFH FRQGLWLRQV DUH DV IROORZV Authors’ current address: S. Chatterjee, A. Raut, S. Kumar, Front End Group, Giant Metrewave Radio Telescope (GMRT), NCRA-TIFR, Pune-410504, India, E-mail: (sougata.sameer@ gmail.com). Manuscript received October 24, 2014, and ready for publica- tion December 16, 2014. DOI No. 10.1109/MAES.2015.140072. Review handled by M. De Santos. 0885/8985/15/$26.00© 2015 IEEE Figure 1. 8QLW FHOO PRGHO RI 0707/ Figure 2. ,QWHUGLJLWDO FDSDFLWRU ZLWK JURXQGHG VWXE
Transcript of Band Pass Filter Bank Design (250–500 MHz) for Radio Astronomy Application Based on Metamaterial...
22 IEEE A&E SYSTEMS MAGAZINE MARCH 2015
Band Pass Filter Bank Design (250–500 MHz) for Radio Astronomy Application Based on Metamaterial ZOR TechniquesSougata Chatterjee, Anil Raut, Suresh KumarFront End Group, Giant Metrewave Radio Telescope Pune, India
INTRODUCTION
M
MTM-ZOR BPF DESIGN FOR 420–520 MHZ
CL LL
Authors’ current address: S. Chatterjee, A. Raut, S. Kumar, Front End Group, Giant Metrewave Radio Telescope (GMRT), NCRA-TIFR, Pune-410504, India, E-mail: ([email protected]). Manuscript received October 24, 2014, and ready for publica-tion December 16, 2014. DOI No. 10.1109/MAES.2015.140072. Review handled by M. De Santos. 0885/8985/15/$26.00© 2015 IEEE
Figure 1.
Figure 2.
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fse fsh fL fR fO
fse is equal fsh
where n LK K
where W S
where
kg
h t
Figure 3. Figure 4.
24 IEEE A&E SYSTEMS MAGAZINE MARCH 2015
Band Pass F i l ter Bank Design for Radio Astronomy Appl icat ion Based on Metamater ia l ZOR Techniques
W L S
n Wg LgCL
LR LLCR
/
BPF BANDWIDTH AND ROLL-OFF CONTROL
(L L L
Table 1.
Specifications for Five-Pole Filter for 420–520 MHz
Item Specification
Central frequency(f0) 470 MHz
Bandwidth (6dB) 100 MHz
Insertion loss < 3 dB
Return loss in the pass band 10 dB
Sharp skirt (Attenuation at fue+30 MHz)
20 dB
Figure 5.
Figure 6.
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Chatter jee, Raut , and Kumar
MTM-ZOR-BASED FILTER BANK DESIGN
SIZE REDUCTION OF FILTER
USING MTM-ZOR
Figure 7.
Figure 9.
Figure 8.
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Band Pass F i l ter Bank Design for Radio Astronomy Appl icat ion Based on Metamater ia l ZOR Techniques
Table 2.
Design Dimensions of the Filter After Modification to the Frequency Range of
420–520 MHz (All Dimensions Are in Millimeters)
Design Parameter 420-520 MHz
ZOR-1 W, S, Wp, L 0.527, 0.11, 0.125, 8.7595
WF , LF 0.8, 5.6
Ls1, Ls2, ls3, ls4
,Ws8.01, 4.005, 2.0025, 2.0035, 0.555
LIRC, WIRC 3.1, 0.3
ZOR-2 W, S, Wp, L 0.562, 0.11, 1.35, 6.52
Ls1, Ls2, Ls3, ls4, Ws 8.9957, 4.49785, 2.248925, 2.248925, 0.69
LIRC, WIRC 2.5, 0.7
ZOR-3 W, S, Wp, L 0.585, 0.11, 1.21, 6
Ls1, Ls2, Ls3, Ws 9.9546, 4.9773, 4.9773, 0.69
LIRC, WIRC 2.5, 0.7
Table 3.
Fabricated Design of the Modified Filter and Its Experimental Results
Design Parameter Expected Achieved
Band width (6 dB) 420–520 MHz 411–517 MHz
Insertion loss 2.0–3.0 dB (470 MHz) 2 dB (470 MHz)
Return loss 10 dB over the band 10 dB over the band
Higher frequency cutoff +30MHz 30 dB (550 MHz) 32 dB (547MHz)
Table 4.
Design Dimensions for the Four Subband Filters That Were Fabricated (All Dimensions Are in Millimeters)
420–520 MHz 360–460 MHz 300–400 MHz 240–340 MHz
ZOR-1 W, S, Wp, L 0.527, 0.11, 0.125, 8.7595
0.54, 0.11, 0.16, 10.5 0.587, 0.1, 0.165, 11.9 5.45, 0.1, 0.267, 18.364
WF , LF0.8, 5.6 4.5, 0.8 0.9, 5 0.8, 5
Ls1, Ls2, ls3, ls4
, Ws8.01, 4.005, 2.0025, 2.0035, 0.555
8.854, 4.4595, 2.22745, 2.22745, 0.555
9.85, 4.925, 2.4625, 2.4625, 0.555
10.85, 5.425, 2.7125, 2.7125, 0.555
LIRC, WIRC 3.1, 0.3 4.1, 0.3 4.2, 0.2 4.2, 0.2
ZOR-2 W, S, Wp, L 0.562, 0.11, 1.35, 6.52 0.555, 0.11, 1, 8.67 0.571, 0.1, 0.9, 9.5 0.55, 0.1, 1.1, 14.6
Ls1, Ls2, Ls3, ls4, Ws 8.9957, 4.49785, 2.248925, 2.248925, 0.69
9.8341, 4.9701, 2.4585, 2.4583, 0.69
11.35, 5.675, 2.8375, 2.8375, 0.69
12.35, 6.175, 3.0875, 3.0875, 0.69
LIRC, WIRC 2.5, 0.7 2.5, 1 2.5, 0.9 2.5, 1.2
ZOR-3 W, S, Wp, L 0.585, 0.11, 1.21 0.54, 0.11, 0.95, 7.763 0.565, 0.1, 0.8, 9 0.56, 0.1, 1.1, 13.9
Ls1, Ls2, Ls3, Ws 9.9546, 4.9773, 4.9773, 0.69
10.82, 5.14, 2.57, 0.69 12.35, 6.175, 6.175, 0.69
13.35, 6.675, 6.675, 0.69
LIRC, WIRC 2.5, 07 2.5, 1 2.5, 0.9 2.5, 1.2
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Figure 10.
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Band Pass F i l ter Bank Design for Radio Astronomy Appl icat ion Based on Metamater ia l ZOR Techniques
CONCLUSION
ACKNOWLEDGMENTS
Figure 11.
Figure 12.
Figure 13.
Table 5.
Measured Results for the Other Three Subbands
Design Parameter Achieved (Expected) Achieved (Expected) Achieved (Expected)
Band width(6 dB) 352–454 MHz
(360–460 MHz)
311–405 MHz
(300–400 MHz)
255–343 MHz
(240–340 MHz)
Insertion loss 1.96 dB (400 MHz)
(2.0–3.0 dB (400 MHz))
1.79 dB (350 MHz)
(2.0–3.0 dB (350 MHz))
1.81 dB (290 MHz)
(2.0–3.0 dB (290 MHz))
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REFERENCES
Uspekhi Fizicheskikh Nauk,
IET Microwaves, Antennas & Propagation,
Proceedings of the 39th European Microwave Conference,
Progress in Electromagnetics Re-search C,
IEEE Microwave and Wireless Components Letters,
Electromagnetics Metamaterial: Transmission Line Theory and Microwave Application.
Current Science,
IOP Conference Series: Material Science and En-gineering.
